Allegiance

Affiliations

Fused Zamasu (合がっ体たいザマス,Gattai Zamasu), (known as Fusion Zamasu in the anime and Fused Zamas in the manga) usually just referred to as Zamasu (ザマス,Zamasu), is a fusion born of the union between Goku Black (the original present Zamasu in the original present Goku's body) and Future Zamasu through the Potara earrings. He is a major antagonist of the "Future" Trunks Saga.

Contents

Appearance

Fused Zamasu in his first appearance

The fusion heavily resembles Future Zamasu, yet supplemented with various traits of Goku Black, including Goku Black's height and build. He possesses Future Zamasu's green skin, gray irises, and white hair; however, his face has more of Goku Black's jawline. He has Future Zamasu's eye shape, but with dark lines under the bottom eyelids and somewhat smaller ears. The fusion's hairstyle looks mostly like Goku Black's as Super Saiyan Rosé (Fused Zamasu himself is a Super Saiyan Rosé throughout his entire appearance in Dragon Ball Super, with the exception of his Infinite Zamasu form in the anime), but with a long protruding bang over the right side of his face, representing Zamasu's mohawk.

He wears Gowasu's green Potara earrings on both ears and Supreme Kai's clothing that is nearly identical to Zamasu's, but with Goku Black's color-scheme, undershirt and red sash. He also wears a Time Ring (in the anime only) on his right index finger.

With his fused body being an unbalanced mix, while his semi-immortal body struggles to heal from damage, his body's damaged sections mutate into a purple and slimy substance, which happened to the entire right half of his body. It also caused the sclera of his right eye to turn yellow and his pupil to turn red. When Fused Zamasu used Light of Justice, it caused his right arm to grow massive.

In the manga, when Fused Zamasu's time ran out, Fused Zamasu began taking on the form of his fusees. As his fused body became an unbalanced mix, with Future Zamasu's immortality struggling to "repair" his body as a single being, resulting in a splitting image of his fusees. On the left, Fused Zamasu resembled Future Zamasu, with his mohawk cut off by his right side. The right side of his body had a resemblance to Super Saiyan Rosé Goku Black. Both were conjoined by a gooey substance, his immortality struggling to keep the components intact.

Personality

"Listen, Saiyan. Listen, Son Goku. You are a mortal, yet you have gained power that surpasses even gods. You are the personification of the failure of the gods who created this universe. As such, by becoming one with Son Goku, I have taken on the sins of mortals and the failure of gods in this body! This is truly the duty of a god."
— Fused Zamasu during his fight with VegitoBlue

Retaining the arrogance and self-entitlement of Goku Black and Future Zamasu, this fusion believes himself to be the embodiment of justice. Reveling in his power, Zamasu openly declared himself the supreme god upon his emergence, repeatedly and consistently vocalizing his divine brilliance and absolute authority. His ego is displayed by how he refuses to even defend himself against Goku and Vegeta, his tendency to hover high over the battlefield to "look down" on everyone both figuratively and literally, and his use of "divine" terms (such as "holy", "judgement", and "absolution") to name his special techniques.

However, beneath his calm exterior, Fused Zamasu is just as unstable as his components, if not more so; according to Gowasu, this is the result of Zamasu's obsession and hatred with the contradiction between gods and mortals. He immediately flies into an overwhelming fury when Trunks and Vegeta briefly overpower him in their beam struggle, despite suffering no damage from the deflected attack, and his rage only grows when Goku manages to actually harm him with God Kamehameha and Kaio-ken. After having his body harmed, and being mutated by the Light of Justice, Fused Zamasu becomes more unhinged and maniacal, prone of furious outbursts. This is due to the fact that his physical body is deteriorating and the conflicting of the souls of the immortal Future Zamasu and mortal Goku Black that make up his form. By the time he engages Vegito, Fused Zamasu is reduced to enraged screaming and furious declarations of godhood, ironically becoming just as destructive and violent as the mortals he wishes to exterminate. In the manga, however, he retains his arrogance, openly gloating and overjoyed at his power. Although he does get angry at Gowasu for neglecting to mention that a permanent fusion can only be achieved by those officially designated as Supreme Kais. Similarly, upon Vegito defusing, he also calls Goku and Vegeta out for using the sacred treasure of the Gods.

Fused Zamasu believing his "justice" is for the greater good of the universe

Interestingly, Fused Zamasu is well aware of his own hypocrisy in taking on mortal elements by using Goku Black as a fusee. He views this as a necessary sacrifice to truly create his new world; by using Goku's body as part of his being, he intends to never forget the "sins" of mortals. He also states that his actions are for the greater good of the universe, even crying at its thought, and metaphorically described his tears as purifying the world. Similarly, he also stated when demanding the Light of Justice strike him that a weak god who cannot destroy evil is "worthless", implying that he can only find value in his existence by being powerful and more importantly being capable of vanquishing what he considers evil.

Biography

Dragon Ball Super

"Future" Trunks Saga

In the anime, Future Trunks uses the Evil Containment Wave on Future Zamasu after Bulma distracts him, to seal him away in a vase, with Future Mai closing it with the lid. Unfortunately, Goku forgot to bring the talisman made by Master Roshi, allowing Zamasu to break free. However, he is left weakened by the effort of escaping and was left deeply shocked that his enemies had discovered a means of actually neutralizing, him despite his immortality. When Black arrived, having sensed Zamasu's ki decreasing, the latter informes his counterpart that they could no longer afford to underestimate the mortals.

Declaring that they would display the true power of gods, Zamasu and Black stand beside each other in the sky, with the former taking his Potara earring from his left ear and attaching it to his right ear. This initiates an explosive Potara Fusion between the two villains, creating Fused Zamasu. Upon his birth, he declares his new form to be the embodiment of justice and the world. He orders everyone to revere and praise him, calling himself "The Supreme God". In the manga after Black has been beaten down by Vegeta, and Future Zamas has given up due to Goku, Black reminds Future Zamasu of their trump card, and they utilize the Potara Earrings to merge into Fused Zamasu.

Fused Zamasu overwhelms both Goku and Vegeta

In the anime, as he manifests a halo of light, Fused Zamasu proclaims his body's abilities, before attacking the Saiyan duo with lightning. Vowing to show them the power of a god, Fused Zamasu launches exploding blades at Goku and Vegeta. After the pair recovers, Zamasu tells them the Zero Mortals Plan will be completed, follows it by attacking with lightning again, and withstanding Vegeta's attack. Deciding to unleash his godly might, Zamasu emits a bird-like ki figure, which repels the Saiyan's, damaging them to such a degree that they revert to their base forms. Overlooking the defeated pair, Zamasu directs his attention to Earth and unleashes his power in an attempt to clean the planet of its filth. However, Vegeta and Goku recover and attack, destroying Zamasu's bird-like ki technique in the process. When they attack Zamasu himself, he blocks their attack and follows it by attacking with his exploding blades again.

Fused Zamasu clashes with Future Trunks

When Future Trunks arrives, the two briefly fight, leading to Trunks being repelled to the ground. Insulting the mortal, Zamasu attacks with Holy Wrath, which clashes with Trunks' Galick Gun. As Zamasu's attack overpowers Trunks', Vegeta joins his son and the two launch a combined Galick Gun, which pushes Zamasu's attack back to him, but causes little to no damage at all. Frustrated at their resistance, Zamasu attempts to attack Trunks but attacks Vegeta instead when he stepped in front of the attack. Afterward, Goku approaches Zamasu and fires his God Kamehameha, which clashes with Zamasu's Holy Wrath.

Fused Zamasu after asking Light of Justice to strike him

Zamasu, however, is overwhelmed by Goku's attack, resulting in an explosion which surprises the semi-god, leaving the right half of his face and body swollen and turning purple. Goku then attacks Zamasu at close range, but Zamasu grabs him by the leg; Goku then enhances his physical attack by combining his Super Saiyan Blue form with Kaio-Ken, and kicks him to the ground, managing to destroy the halo in the process. Goku ends up too exhausted to attack further and collapses afterward. Zamasu then screams Goku's name in anger and hate and charges up by calling upon a pink-colored lightning streaks to spread his mutated arm.

In the manga, Fused Zamasu quickly attacks Super Saiyan Gods Vegeta and Goku immediately after fusing, incapacitating them. The two try and fight him individually in their Super Saiyan Blue forms, but find that they cannot defeat him. When Goku faces him he blows a hole through him, however, Fused Zamasu's immortality allows him to quickly regenerate - to which Fused Zamasu is overjoyed that his immortality is still completely intact following the fusion. Realizing that there is no other way to win but to fuse Goku and Vegeta utilize the Potara to merge into Vegito.

Fused Zamasu vs. Vegito Blue

In the anime, as Vegeta and Goku manage to fuse into Vegito, Zamasu wonders to himself why mortals try and imitate the gods, declaring it sinful. He is interrupted by Vegito's punch square in the face because of getting tired of his talk. Vegito ascends into Vegito Blue, and the two begin their battle, and at first, Vegito seems to have the upper hand. Vegito mocks Zamasu, asking if this is really the power of a god. Zamasu angrily knocks Vegito to the ground. Zamasu then tried to finish off his opponent with his ki blade, but Vegito counters with one of his own. After Vegito explains that Zamasu is technically also mortal due to fusing with Goku's body, Zamasu stated that's all he wants; by obtaining the power of Goku, who surpassed the gods despite being mortal, he symbolized all the failures the gods have made, atoned for the sins of mortals and the mistakes of the gods.

Fused Zamasu defeats Goku and Vegeta after they defuse

Zamasu cries (much to Vegito's disbelief), saying that his tears will purify the world, before powering up, resulting in his right side growing more grotesque. As the two resumed their fight, Vegito taunts Zamasu for not being able to keep up with his speed and fires his Final Kamehameha, but Zamasu emerges unscathed. As Vegito uses up all his power to sustain his fusion into his Final Kamehameha, the fusion time runs out and Vegito defuses back into Goku and Vegeta, leading to Zamasu attacking the pair and defeating them effortlessly. Before he could kill the two, Trunks arrives and blocks Zamasu's attack.

Fused Zamasu vs Vegito

In the manga, Vegito transforms into a Super Saiyan Blue, proclaiming that he is not a true god and is simply a mortal like him due to never officially having become a Supreme Kai - also boasting that Fused Zamasu's fusion will wear off in an hour too. Fused Zamasu angrily curses Gowasu for never telling him about the time limit of fusion. The two begin to fight but Vegito easily decimates Fused Zamasu, at one point slicing Fused Zamasu's hands off so fast that he does not notice. Fused Zamasu materializes many cubes of Katchin and throws them at Vegito, while at the same time Vegito prepares his Final Kamehameha in order to finish off Fused Zamasu, however before he can fire the fusion unexpectedly wears off and Fused Zamasu's Katchin hits Goku and Vegeta, knocking them to the ground.

Fused Zamasu defeated by Future Trunks

In the anime, Fused Zamasu, whose mind is completely surrendering to insanity, then fights Trunks, while accusing the mortal of being weak, and mockingly asks where he'll seek help from next, but Trunks responds by saying that he just wanted to save everyone. As Trunks held out against Zamasu, he unconsciously gathered ki from Earth's inhabitants. Goku and Vegeta contribute their ki too, and with everyone's power channeled into his sword, Trunks charges at Zamasu. Unable to defend himself from Trunks' enhanced sword technique, Zamasu is stabbed. While in disbelief about mortals retaliating against him and his "justice", and also asking Trunks if he'd dared to go against the "justice" of a god, Trunks declares his "justice" meaningless, before slicing Fused Zamasu in half, destroying his body in the process. However, Zamasu's hate-filled will lived on, only to be erased later by Future Zeno.

Fused Zamasu faces off with Completed Super Saiyan Blue Goku

In the manga, Fused Zamasu knocks Vegeta way and then proceeds to torture Goku using numerous portals. Vegeta saves Goku and so Fused Zamasu brutally beats down Vegeta, before he can kill Vegeta however, Goku steps in and reveals his Super Saiyan God Super Saiyan (completed) form, Fused Zamasu and Goku begin to fight on even grounds, with Fused Zamasu unleashing a barrage of punches via portals and Goku dodging and attacking Fused Zamasu when he has the opportunity, Fused Zamasu then utilizes his Holy Wrath but Goku manages to toss it away after a struggle, and then knocks Fused Zamasu into a building. Fused Zamasu rises from the rubble and proclaims that Goku's overconfidence is a weakness and he will defeat him. By this time, he has 20 minutes left before defusing.

Goku Black and Future Zamasu trying to maintain the fusion

Fused Zamasu and Goku continue to fight, Fused Zamasu threatens to destroy the entire galaxy by further increasing his own power. When Goku tries to kill him with Destruction, Zamasu opens a portal which brings Future Mai in front of him, forcing Goku to stop. Eventually, Fused Zamasu's fusion time runs out, but Future Zamasu's immortality will not allow Fused Zamasu to defuse, and he takes on a half-Goku Black half-Future Zamasu state, though Future Trunks immediately cuts him in half.

However, this results in unforeseen consequences, where Future Zamasu's immortality had merged Black and Future Zamasu on a cellular level, resulting in a mutation/evolution. This made Zamasu stronger than he was before. However, this evolution was ultimately erased by Future Zeno.

Other Dragon Ball stories

Dragon Ball Fusions

During the time of the Timespace Tournament, Present Zamasu is summoned by Goku Black to act as his ally, the two decide to use the Timespace Rift for their own ends to exterminate mortals. Upon being forced into battle with Tekka's team and Future Trunks, Zamasu and Goku Black fuse together into Fused Zamasu (named Fused Zamas in the game). It is then discovered by the group that other Timespace's are disappearing, and Fused Zamasu reveals that this is because his comrades are wiping them out. Fused Zamasu then summons his comrades - four other Zamasus from other Timespaces - two of which are Goku Blacks. The group realizes that the Zamasus are linked to Fused Zamasu, and that is how they are able to stay in this Timespace, and so decide they must defeat him. The two Goku Blacks turn Super Saiyan Rosé and the battle begins. Fused Zamasu is defeated in the end.

Dragon Ball Xenoverse 2

During the events of "Future" Trunks Saga, when Goku Black and Future Zamasu fuse into Fused Zamasu, the Supreme Kai of Time finds out that Goku dropped the button to call Future Zeno, knowing that he's the only hope to stop Zamasu. When Fused Zamasu gets struck by the Light of Justice, he tells the Future Warriors that after he's done with Future Trunks' timeline, he plans to go to the Time Nest to destroy the remaining gods (Supreme Kai of Time and Old Kai). After hearing this, the Supreme Kai of Time tells the 1st Future Warrior to return immediately to give him a new mission to give the Zeno button to Goku and tells the 2nd Future Warrior to distract Zamasu while Goku And Vegeta fuse into Vegito. When Super Saiyan Blue Vegito tries to deliver the finishing blow, the Potara Fusion wears off and Future Trunks comes to the rescue.

Fused Zamasu and Future Trunks clash

Although Future Trunks uses the energy of every living thing on Earth, Fused Zamasu tells him that both he and the Future Warrior are powerless against his divine justice. Future Trunks then asks everyone to give him more power to defeat Fused Zamasu. Through the Time Rift, Gohan, Piccolo, Pan (GT), Trunks (GT), Goku (GT), a young Future Trunks, Future Gohan, and Xeno Trunks give him the energy to create the Sword of Hope, finishing Fused Zamasu once and for all. Infinite Zamasu is then born.

Power

Fused Zamasu is one of the most powerful fusions in the series, possessing the combined powers of Goku Black and Future Zamasu.

Anime

In the anime, this fusion is shown to be able to fend off the combined efforts of Super Saiyan Blue Goku, Super Saiyan Blue Vegeta, and Super Saiyan Rage Trunks with ease.

Gowasu notes that Black and Zamasu's fusion has expanded their combined power to no visible end. In addition, Fused Zamasu possesses Future Zamasu's immortality and Goku Black's limitless potential growth, making him a near-perfect entity. These facts cause Shin to note that Fused Zamasu's standing as a god is beyond even their understanding.

Vegeta notes that, god or not, he has never seen or felt anyone let off energy like Fused Zamasu's. He is also able to singlehandedly overwhelm Goku and Vegeta, nearly crushing their hands simultaneously, and also nearly killing Super Saiyan Blue Vegeta in one blast. However, when he engages in a beam struggle with both Super Saiyan Anger Trunks and Super Saiyan Blue Vegeta at the same time, Fused Zamasu is overwhelmed. Super Saiyan Blue Goku at full power also manages to hold his own against him, defeat him in a beam struggle (though the amount of power Goku used damaged his arms) and successfully engage him in combat, breaking his wall of light with the Kaio-ken.

Against Super Saiyan Blue Vegito, Grotesque Fused Zamasu proved able to make the mighty fused foe fight seriously and rival even him in terms of power. As such, many of Fused Zamasu's attacks forced Vegito to dodge, which still caused considerable damage to the area from the sheer force of his blows.

According to Gowasu, Fused Zamasu's body is unstable due to one fusee being immortal and the other fusee being mortal. This caused Fused Zamasu's body to fluctuate, creating mutations in his body that multiplied his size and power, but left his body completely unstable and no longer completely immortal, although he did retain a tremendous amount of durability and a potent healing factor. In his half-corrupted form, Fused Zamasu is able to fight with VegitoBlue, with neither fighter being able to land a decisive blow, though Vegito was overwhelming Fused Zamasu.[1] When he gained his Gigantification form, Fused Zamasu was too slow to keep up with Vegito but withstood his Final Kamehameha without any visible damage, and also took a massive punch to the face, at which point Vegito defused and Fused Zamasu was able to defeat both Goku and Vegeta with one blow. Ultimately, however, his new instability proved to be his undoing, which ultimately led to his death at the blade of Future Trunks - who had absorbed a Spirit Bomb.

Manga

It is stated that due to being a sync up of two versions of Zamasu, Fused Zamasu's fighting skill is far greater than before. He even shows off speed greater than any character in Dragon Ball prior to this to take down Super Saiyan God Goku and Vegeta. Later, Super Saiyan Blue Goku manages to hold his own against Fused Zamasu in one on one (though Fused Zamasu has a large advantage) and even blasts a hole through Fused Zamasu with a God Kamehameha, however, the fusion simply regenerated and takes down Goku by hitting him with many blocks of Katchin.

Fused Zamasu had his entire side blown off by base Vegito (though it was a surprise attack), and was shown to have a great disadvantage against Vegito Blue, who was noted by Shin to have power potentially surpassing Beerus, with Fused Zamasu being unable to track Vegito Blue's movements at one point, allowing the fused Saiyan to cut off his hands without him noticing.

After Vegito defuses Fused Zamasu faces off against Goku - who reveals his mastery of Super Saiyan Blue that he had been hiding. Fused Zamasu is a match for Goku in this state - which possesses the true full power of Super Saiyan Blue at all times - and manages to hold the edge over Goku thanks to his immortality. Vegeta states that using completed Super Saiyan Blue, Goku can fight evenly with Fused Zamasu.

Statements by guidebooks and authors

According to the Dragon Ball Super rival danger scale, Super Saiyan Rosé Fused Zamasu ranks as a twelve out of twelve, with it noting that he is so strong that others cannot even approach him.[2]

In Toriyama's original draft, while Fused Zamasu is immortal, two Super Saiyan Blues together would be able to defeat him.[3]

Abilities

As a fusion of Future Zamasu and Goku Black, Fused Zamasu possesses all the techniques and abilities of his fusion components and more:

Continuous Energy Bullets - Zamasu can unleash this attack from a single hand. Appears in Xenoverse 2 it appears as Fused Zamasu's unique Strong Attack.

Immortality – The ability to remain unchanged by the passage of time, unable to die, and simply live forever. This power was obtained from Future Zamasu, who wished for it through the Super Dragon Balls. In the anime, as a result of Goku Black's presence within his being, Fused Zamasu is not completely immortal; only ageless and possessed an enhanced durability with high tolerance for pain and damage. While his semi-immortal body can be destroyed, Fused Zamasu can still live on in a bodiless state that has assimilated with the very universe itself, unless every single trace of him is gone. In the manga Fused Zamasu's immortality appears to be fully intact, and likewise allows him to maintain an edge over Goku's Completed Super Saiyan Blue form.

Barrier of Light - In the anime, Fused Zamasu creates a white halo of light around his body, which acts like a barrier.

Wall of Light – Fused Zamasu emits a powerful purple bird-like structure of enormous energy which eliminates all that it touches.

Lightning of Absolution - Fused Zamasu fires a purple-colored lightning blast from his ring of light, or the body of his Wall of Light.

Blades of Judgement - From his halo, Fused Zamasu fires a barrage of red energy blades that can strike the opponent. If the blades makes contact with the earth, they will burst in a destructive explosion.

Black Ball Rain - An energy barrage version of the Holy Light Grenade. In the manga, Fused Zamasu used this technique in attempt to kill Goku, Vegeta, Future Trunks, Future Mai, Shin, and Gowasu.

Divine Wrath - A variation of Fused Zamasu's Holy Light Grenade where radiates his halo and from his hand, he releases a purple energy blast, that obliterates his opponents. One of his unique Special Moves in Dragon Ball Fusions.

Holy Wrath - Fused Zamasu creates a sun-like energy sphere that combines Black Power Ball with God Splitter and tosses it at his opponent, expanding it to a large size. In Dragon Ball Super it is Fused Zamasu's ultimate attack, though in Xenoverse 2 it is a Super Skill and is depicted as a weaker version of Divine Wrath: Purification.

Spiral of Condemnation- A variant of the Divine Hammer hurricane attack except Fused Zamasu uses ki to amplify his whirlwinds he creates when using Divine Hammer.

Light of Justice- A powerful, self-harmed thunderstorm-like energy wave attack that powers Fused Zamasu up. This is what caused him to further mutate his arm and gain his full Half-Corrupted form. This technique also appears in Dragon Ball Xenoverse 2 as an eye blast Super Attack exclusive to Half-Corrupted Zamasu.

Flames of Retribution - Zamasu shines red and bursts out ki from all over his body, starting from his right eye.

Magic Materialization - In the manga, Fused Zamasu is able to use magic materialization in order to create blocks of Katchin to use as weapons. He is also able to restore his damaged clothing.

Telekinesis - In the manga, Fused Zamasu uses telekinesis in order to choke both Goku and Vegeta, and later to manipulate blocks of Katchin to throw at his foes.

Portal Opening - In the manga Fused Zamasu possess the ability to open dark portals.

Illusion Smash - Through his ability to open portals, Fused Zamasu is able to open a portal near himself and near his opponent so he can punch them from a distance.

Kiai - A technique where the user affects the air currents around him with ki to produce powerful shockwaves in order to strike the opponent. Used by Fused Zamasu as part of his combos in Xenoverse 2.

Invisible Eye Blast - A technique involving the user to shoot a kiai out from their eyes. Used by Fused Zamasu in the manga.

Summoning - In Dragon Ball Fusions, Fused Zamasu has the ability to summon incarnations of himself from different time-spaces, however if he is defeated they will disappear, as he is their link to that timespace.

Magical Thunder - Fires a bolt of magical energy from his finger. One of Fused Zamasu's Special Moves in Dragon Ball Fusions.

Psychic Thunder - A stronger version of Magical Thunder that appears as one of Fused Zamasu's learnable Special Moves in Dragon Ball Fusions.

Energy Charge - A ki charging technique used by Fused Zamasu as one of his Special Moves in Dragon Ball Fusions.

Divinity Unleashed - A ki charging technique used by Fused Zamasu to combine the two sources of his power into himself which gives him the power to create the Barrier of Light in Dragon Ball Super. Was named in Xenoverse 2 where it appears as one of Fused Zamasu's Super Skills. It can be used as a variant of the Full Power Charge for the Future Warrior.

As the Potara Fusion of Black and Future Zamasu was performed while the former was still in his Super Saiyan Rosé state, Fused Zamasu is constantly and permanently in the Super Saiyan Rosé form. Because of which, the resulting fusion probably cannot enter a normal form nor power down. While this would normally cause a significant strain on the fusion's body and shorten his lifespan, the immortality from Future Zamasu, to an extent, eliminates this problem despite the "unstable" fusion affected by Goku Black (as his body isn't immortal). In the manga, he also retains his hour limitation for staying fused for presumably the same reason, despite Super Saiyan Rosé being a Super Saiyan God Super Saiyan form, and it's equivalent, Super Saiyan Blue, caused Vegito to defuse in half an hour instead of an hour as originally estimated. When cut in half around the time he defused, a negative side effect to the fusion was that the fusion attempted to repair itself due to Future Zamasu's immortality, thus warping his features.

Fused Zamasu's physical appearance in the Super Saiyan Rosé form is that of a standard Super Saiyan with white hair and grey eyes. The white hair and grey eyes were presumably inherited from Future Zamasu, however Fused Zamasu's eye color could possibly be inherited from the Super Saiyan Rosé form as well. Furthermore, Fused Zamasu possesses a bright, colorful white aura while in the Super Saiyan Rosé form in the anime. Fused Zamasu remained in the Super Saiyan Rosé form throughout his entire appearance in Dragon Ball Super, except when he becomes Infinite Zamasu in the anime, the only time Fused Zamasu is ever seen in his base form.

In some video games, Super Saiyan Rosé acts as Fused Zamasu's own version of the first, standard Super Saiyan form.

HaloMain article: Barrier of Light
In the anime, by creating the Barrier of Light, Fused Zamasu takes on his "Halo" state. In this form Fused Zamasu is capable of utilizing his Halo for numerous purposes, but it's primary function is defense - though it can be destroyed by a powerful attack and when this happens Fused Zamasu reverts to his normal form.

In the anime, by calling upon the Light of Justice, Fused Zamasu becomes larger and more muscular. In this form he is named Grotesque Zamasu, Fused Zamasu (Right Arm Enlargement)[4] or Fused Zamasu (Half-Corrupted)[5] His aura changes from colorful white to that of Black's as Super Saiyan Rosé. Despite the great increase in power, the flawed nature of Fused Zamasu's body comes with a side-effect of his body mutating, resulting in half of his body becoming an oversized and purple gooey substance. Grotesque Zamasu also has his right eye to gain a purple iris and yellow sclera.

Grotesque Zamasu is cut in half in the manga

In the manga Fused Zamasu's Grotesque form is a result of his Potara Fusion running out, but Future Zamasu and Goku Black being one and the same, causing them to refuse to defuse, resulting in a monstrosity half Goku Black half Future Zamasu, who is splitting down the middle due to Goku Black and Zamasu refusing to come undone.

As a result of his great anger at losing to Vegito, combined with the forced mutation from his Light of Justice, Fused Zamasu bulks himself up and grows to become huge, amplifying his power even further at the cost of his speed. He is able to survive Super Saiyan Blue Vegito's Final Kamehameha. This is Fused Zamasu's variant of the Super Saiyan Third Grade form, however, he utilized this form while in the Super Saiyan Rosé form.

In the anime, after Trunks destroyed his body that was only semi-immortal due to Goku Black, Fused Zamasu still survived due to the immortality of Future Zamasu and re-appears as Infinite Zamasu, a bodiless, omnipresent, non-corporeal form, becoming a reality encompassing entity in an attempt to become order and justice itself. This bodiless entity had the face of Fused Zamasu patterned along its corrupting presence that was spreading across the multiverse and bleeding into the present timeline.

Infinite Zamasu in the manga

In the manga, Infinite Zamasu is Fused Zamasu's evolved state, which resulted from Fused Zamasu's DNA mutating due to his immortality struggling to be one being when his time fused was up. In this form, Infinite Zamasu looks completely identical to Fused Zamasu, except his immortality has reached even greater heights due to the regeneration process increasing exponentially.

In a gag panel for the manga, one of the many Fused Zamasus who make up Infinite Zamasu is shown to have transformed into Monaka, he is alerted to this by one of the other Fused Zamasus. This is presumably a side effect of Zamasu's past attempt at switching bodies with Monaka.

Trivia

Fused Zamasu is the first villain in the franchise to be created by use of Potara Fusion, and the second fused villain overall (behind Super 17).

Unlike Old Kai and Kibito Kai, Fused Zamasu does not have a singular voice. Instead, his voice consists of two "Zamasu" voices overlapping one another. This may be due to the fact that both of his components were technically separate instances of the same being (albeit with one possessing a different person's body). It also fits with the trend of Supreme Kai Potara fusions being voiced by a single person.

In the Funimation dub of Dragon Ball Xenoverse 2, an echo effect is added to the voice for Fused Zamasu.

Fused Zamasu is similar to Super 17, in the sense that both characters are fusions of two counterparts of the same individual. However, in Super 17's case one of his fusee is an artificial incarnation (as Hell Fighter 17 is an artificial copy of Android 17).

Fused Zamasu is the first fusion created by two alternate timeline counterparts fusing as Goku Black is Zamasu from the unaltered main timeline (who succeeded in killing Gowasu and stealing Goku's body) and Future Zamasu is the Zamasu of Future Trunks' alternate timeline.

In the manga, Fused Zamasu is the first Immortal fusion (as Goku Black and Fused Zamasu became fused at the cellular level). In the anime, he is the first Semi-Immortal fusion (as Goku Black half remains mortal while Future Zamasu is immortal).

Fused Zamasu's, along with Infinite Zamasu's Super Saiyan Rosé forms possess white hair and have white auras, rather than the light pink hair and reddish/pink/purple aura that Goku Black has when he transforms into a Super Saiyan Rosé. The reason for this is never stated or even implied in either the Dragon Ball Super anime or manga. Fused Zamasu in his (Super Saiyan Rosé) form presumably inherited his white hair from Future Zamasu.

Interestingly, not a single character in either the Dragon Ball Super anime or manga itself ever reference, or otherwise note that Fused Zamasu or Infinite Zamasu are in the Super Saiyan Rosé form throughout their entire appearance in Dragon Ball Super.

It can be noted that in Xenoverse 2, and after achieving his Half-Corrupted form in the anime, Fused Zamasu retains the aura of Super Saiyan Rosé, however.

Fused Zamasu shares similarities with Baby, while the latter is possessing Vegeta. They both ironically become the very thing they hated and destroyed their race's good name, Mortals and Saiyans respectively. They also gain further forms that end up nurturing their path to darkness. The "saviors" also have white hair when transformed into their Super Saiyan forms.

Fused Zamasu is one of only two forms of Zamasu that does not have Heart Purity, the only other one being Infinite Zamasu.